title: Modulated photoluminescence of graphene quantum dots in the vicinity of an individual silver nano-octahedron.
abstract: We propose an effective strategy to enhance and modulate the photoluminescence (PL) of graphene quantum dots (GQDs) in the vicinity of a single silver nano-octahedron (SNO) utilizing three-dimensional finite-difference time-domain calculations. The SNO is designed to act as a multifrequency plasmonic antenna with multiple plasmon resonance modes covering multiple emission peaks of GQDs. The spectral modifications of spontaneous emission are investigated with the variations of the GQD's position and dipole moment orientation relative to the SNO. The PL colour of the GQD can be precisely adjusted between blue and green through the strong interaction with the designed antenna. The multicolour features of GQDs will also facilitate their potential applications as eco-friendly and multifunctional optical probes. The study contributes to a deeper understanding of the PL properties of GQDs near the metallic nanoparticles.
authors.affiliation: Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China. dwhe@bjtu.edu.cn xqzhang@bjtu.edu.cn.
authors.forename: Wenshuo
authors.initials: W
authors.lastname: Wang
authors.forename: Dawei
authors.initials: D
authors.lastname: He
authors.forename: Jiahua
authors.initials: J
authors.lastname: Duan
authors.forename: Ming
authors.initials: M
authors.lastname: Fu
authors.forename: Xiqing
authors.initials: X
authors.lastname: Zhang
authors.forename: Hongpeng
authors.initials: H
authors.lastname: Wu
authors.forename: Yin
authors.initials: Y
authors.lastname: Hu
authors.forename: Yongsheng
authors.initials: Y
authors.lastname: Wang